gatt: Fix function name

Remove _le_ from function name as it misslead about transport.
Transport is provided as a parameter.

Bug: 355767463
Test: mmm packages/modules/Bluetooth
Flag: Exempt, mechanical refactor
(cherry picked from https://android-review.googlesource.com/q/commit:1dded8e0336238fdb5c7819fbef0cf729475aac3)
Merged-In: I94d87bb62225e478f2814904a19c1b7debaa4f3d
Change-Id: I94d87bb62225e478f2814904a19c1b7debaa4f3d